@ 5 miles ( 8 @ . @ 9 km ) long , climbing 4 @ , @ 600 feet ( 1 @ , @ 400 m ) at a less @ - @ punish ##ing gradient than the north el ##bert trail , approaching from the south and then climbing the eastern ridge . the most difficult of the main routes is the black cloud trail , a class 2 climb that takes ten to fourteen hours depending on pace , gains 5 @ , @ 300 feet ( 1 @ , @ 600 m ) in elevation , and also involves an ascent of the sub @ - @ peak , south el ##bert , at 14 @ , @ 134 feet ( 4 @ ,
@ 5 miles ( 8 @. @ 9 km ) long, climbing 4 @, @ 600 feet ( 1 @, @ 400 m ) at a less @ - @ punishing gradient than the north elbert trail, approaching from the south and then climbing the eastern ridge. the most difficult of the main routes is the black cloud trail, a class 2 climb that takes ten to fourteen hours depending on pace, gains 5 @, @ 300 feet ( 1 @, @ 600 m ) in elevation, and also involves an ascent of the sub @ - @ peak, south elbert, at 14 @, @ 134 feet ( 4 @,